I trust you actually mean stripper or stripper solution, and not the slurry of spent stripper and emulsified floor finish, which is another problem in itself. See answer #2.
This is a case of “If at first you don’t succeed, try, try, again.” Keep in mind that a loss of color and or a change in the appearance and or texture of the face yarns are a definite possibility. Time is of the essence so the sooner you begin the spot removal process the better results you''ll get. Before the spill or spot dries ... — Lynn E. Krafft, ICAN/ATEX editor